Rifle-sight.



OR l 216'2783 5R J. A. DIETZ.

RIFLE SIGHT. MPL10/men man 1m13.191s.

me :mums grens cc. rNomu-mo., nusmnnmn. n. c.

Patented Feb. 20,1917.

UNITED STATES PATENT FFICE.

JOI-IN' A. DIE'IZ, OF NEW YORK, N. Y.

RIFLE-SIGHT.

Application filed January 13, 1915.

To all whom t may concern:

Be it known that I, JOI-IN A. Drn'rz, a citizen of the United States, and resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Rifle- Sights, of which the following is a specification.

My improvement relates more particularly to the rear sight of the ordinary army rifle and may be considered as a substitute or attachment therefor whereby the point of sight on a target, proportionally reduced for reduced load and reduced distance, shall be the same as for full load and full distance on a full sized target when the regular battle sight is used.

With the folding leaf rear sight as ordinarily supplied with the army rifle the battle sight is on the side of sight block and is brought into use when the leaf is thrown down. This battle sight is used for outdoor ractice on a full sized target, with full load on full battle sight distance. It is customary, however, to conduct rifle practice on indoor ranges where thel distance is reduced and the size of the target is proportionally reduced.

To approximate outside conditions the powder charge in the ammunition used indoors is correspondingly reduced according to predetermined proportions.

lVith the reduced load andr reduced distance of indoor conditions it is found that the point on the target at which aim should be taken is different from that of a similar target outdoors.

The object of my improvement is to do away with the necessity of changing the point of sight and thus remove or reduce the mental strain so that the conditions as to rifle practice indoors may simulate as nearly as possible those of outdoor use of the same rifle.

In the drawings Figure 1 represents a plan view of the ordinary leaf sight the leaf being in the folded position with my invention in place; Fig. 2 is a side view of the same, the sight leaf being shown in elevated position in dotted lines; Fig. 3 is a section at 3-3 of Fig. 2 showing the method of attachment of my adapter; Fig. l is a view of the adapter; Fig. 5 represents a target.

Referring to the drawings it will be understood from the lexplanation previously given that when a rifle carrying a rear sight Specification of Letters Patent.

Patented Feb. 20, 1917.

Serial No. 1,909.

such as that shown in the drawings, Figs. 1 and 2 is used for outdoor practice upon a target it is customary to aim at a spot below the center of the target such as A, the center of the target being represented at B. Vhen the rifle is so sighted the bullet should reach the center of the target. When the same rifle is used for indoor practice with reduced load, distance and charge and proportionately reduced target it has been found necessary to aim at a higher point, for instance at or near the center of the target B rather than at the point A in order to be sure of hitting the target centrally. This change in the sighting of the rifle of course, entails a mental effort on the part of the marksman every time that lie fires a shot in order to bear in mind the point at which it is necessary for him to aim the rifle and whether he is practising indoors or out.

The object of my device is to overcome this diiliculty by providing an adapter which preferably may be inserted and secured to the leaf 1 of the rear sight of the rifle. The rear sight shown is the ordinary leaf pattern provided with a base plate 2 and an adjustable sight block 3 slidable in ways 4 on the leaf 1 and having a battle sight 3; the sight block 3 is adjustable vertically along the graduated arms of the leaf according to the distance of the target in the usual manner when the leaf is in the elevated position indicated by the dotted lines in Fig. 2. For indoor practice this rear sight is not reliable in that as previously pointed out it is necessary to change the point on the target at which aim is taken. My adapter comprises a block 5 cut away at 6 to form a web connected with two laterally extending arms 7 the notches thus formed between the main body of the block 5 and the arms 7 being adapted to surround the slide ways of the leaf 1 substantially as shown in Fig. 3 of the drawings. The block 5 is preferably thicker than the metal at the sight notch and this is accomplished in the present instance by inserting a strip of metal 8 in a slit in the top of the block 5 and riveting it thereto by rivets 9 substantially as shown in Figs. 3 and 4 of the drawings. The sight notch is indicated at 10 and is so placed that the point at which aim is necessary on the indoor target of reduced dimen- 'f sions is identical with the point of aim the same rifle requires when using the regular battle sight on a full sized target on an outdoor range. Thus by the use of my adapter the same conditions as to sighting at the target will prevail for both indoor and outdoor practice and the mental strain Will be removed. My adapter may be attached to the rifle in any suitable Way7 but preferably I have arranged it as indicated so that the arms 7 extend laterally on the under side of the leaf member l, the adapter being inserted into the slot in the leaf and given aquarter turn which will bring it into the position of use and it is then clamped in this position by dropping the slide block 3 so that the tail piece 3a thereof shall contact with the face of the block 5 and clamp it in position. It will be understood that for different forms of rear sights slight modifications may be required in attaching my adapter but it must be borne in mind that each adapter siglit should be so arranged and the notch placed at required height to enable the one using the rifle to aim at the same point on the target for indoor target practice, as the particular rifle he is using requires for outdoor practice.

Various modifications may be made in the specific details of construction and adaptation Without departing from the spirit and scope of the claims.

I claim:

l. In a riiie sight the combination with a folding leaf rear sight having a battle sight adapted for use With full load at full distance on a full sized target, of a sight member adapted for use with reduced load, at reduced distance on a proportionally reduced target, the relations therebetween be ing such that the point of sight is the same and means for securing said sight member to the rear leaf sight as a substitute for said battle sight.

2. In a rifle sight the combination With a folding leaf rear sight having av battle sight, of a removable member provided With a sight notch adapted for use with reduced load, and means for securing said member to said folding leaf, said member being adapted, when the folding leaf is down, to serve as a substitute for the battle sight, the relative proportions being such that the point of sight for reduced load and reduced distance on a proportionally reduced target is the same as for full load and full distance on a full sized target.

3. In a rifle sight the combination with a folding leaf rear sight having a battle sight adapted for use with full load at full distance on a full sized target, of a sight member adapted for use with a reduced load, at reduced distance on a proportionally reduced target, the relations therebetween being such that the point of sight is the same and arms for said sight member adapted to secure said sight member to the rear leaf sight as a substitute for said battle sight.

il. The combination with a folding leaf rear rilie sight provided with an open slide and a sight block slidable thereon, of a removable member provided with a sight notch, lugs on said member for engaging said slide, said sight block being adapted to clamp said member in position on said leaf whereby when the leaf is down said member provides a rear sight such that the point of sight for reduced load and reduced distance on a proportionately reduced target is the same as for full load and full distance on a full sized target.

In testimony whereof I have hereunto set my hand in the presence of tivo subscribing Witnesses.

JOHN A. DIETZ.

Vitnesses:

M. H. LooKWooD, Jol-1N A. FERGUSON.

Copies of this patent may be obtained for :ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

